FIGURE 1. Map showing the locations and spatial relationships of documented mammal-bearing fossil assemblages assigned to the late Paleocene Clarkforkian NALMA: 1, Clark's Fork Basin; 2, Bighorn Basin; 3, Togwotee Pass; 4, Buckman Hollow; 5, Mark's Locality; 6, Big Multi Quarry; 7, Piceance Basin.

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FIGURE 2. Multituberculata and Cimolesta. 2.1-2.3, UCMP 170782, Neoliotomus conventus, left i1 in lateral (2.1), occlusal (2.2), and lingual (2.3) views; 2.4, UCMP 173399, Barylambda faberi, left M1 fragment.

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FIGURE 3. Creodonta. UCMP 173490, Dipsalidictis krausei left m2, in occlusal (3.1), lingual (3.2), and lateral (3.3) views.

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FIGURE 4. Primates. UCMP 173400, Plesiadapis dubius, in lateral (4.1), lingual (4.2), and occlusal (4.3) views.

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FIGURE 5. Primates. Comparative occlusal view of Plesiadapis dubius from Buckman Hollow. 5.1, USNM 16696 (holotype of P. "rubeyi"), 5.2, UCMP 173400. 5.3, USNM 20787 (holotype of P.? "pearcei").

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FIGURE 6. Dinocerata and Mesonychia. 6.1, Probathyopsis sp., cf. P. harrisorum, UCMP 173492, partial Px or M1. 6.2, Probathyopsis sp., cf. P. harrisorum, USNM 21284, Px (previously illustrated in Gazin, 1956, pl. 1, fig. 3). 6.3, Probathyopsis sp., cf. P. harrisorum, USNM 21283, Px or M1 (previously illustrated in Gazin, 1956, pl. 1, fig. 2). 6.4, Dissacus sp., cf. D. praenuntius, USNM 11699, partial left M2. 6.5, Dissacus sp., cf. D. praenuntius, USNM 406145, right p2 or p3 talonid.

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FIGURE 7. Phenacodontid condylarths. 7.1, Phenacodus intermedius, UCMP 170704, right dentary with m1-3. 7.2, Ectocion cf. E. major, UCMP 173496, right maxilla with M2. 7.3, Ectocion osbornianus, UCMP 173401, right dentary with partial m1, m2, partial m3. 7.4, E. osbornianus, USNM 20736, left maxilla with P2-M3 and dentary with p3-m3.

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